In Lu Xun's cultural history of the 20th century, there is a phenomenon of double construction.

在20世纪鲁迅文化史中，存在着一个双重建构的现象。

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The plants slated for construction in the next four years will double that capacity.

未来四年计划修建的工厂还将使这一产量增加一倍。

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The piece has a yellow painted trumpet neck and a double-walled construction, meaning an inner vase can be seen through the perforations of the main body.

它被称作是“一件展示了陶艺和绘画工匠的高超技能的精致工艺品”，黄色的喇叭瓶口和双层瓶壁的构造，意味着可以透过瓶身上的齿孔看见内层瓶壁。

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Average rent for a two-bed flat in an older building costs around 5, 000 Danish kroner per month, while those in new construction can cost double that.

BBC: Living in: Cities known for architecture

Scotland's off-site construction sector could nearly double in value over the next five years, a study has suggested.

BBC: Off-site construction sector forecast to grow

Private companies working on everything from the foundation to the roof of buildings are generating double-digit sales growth as the construction sector strengthens, according to data from Sageworks, a financial information company.

FORBES: From Floor to Ceiling, Construction Companies Growing